Rendering Large Images

[holmes1977]

I have been using Vray for about a year now to present my designs to my clients.

The more I use it the more I love it. But also realize its limitations due to SU.

My client wants to print a 1.2m x 2m advertising sign. Which means I would have to have a render output of 3600 x 6000 pixels or more. (please correct me if Im way off). I am having major problems with SU crashing at anything above 2048 x 1536. This is also using the render to VrImage method.

I realize that SU crashes because of its Ram use limits. So I cant quite understand how people use Vray to render any SU file above 25mb at large res.

As soon as I press render I painfully watch the Ram usage go up to 3ish gb then crash. Is there something Im missing, or doing wrong?

How do other people work around this problem?

Im using:

-The latest Vray
-SU 7 pro
-Win 7 prof 64bit
-i7 CPU 920 @ 2.67Ghz
-6gb Dominator Ram

Thanks for any help

[rspierenburg]

Re: Rendering Large Images

I'm not 100% sure as I've not tried it myself. But could rendering to vrimg be a viable solution here?

[thomthom]

Re: Rendering Large Images

That was one of the tried methods.

It should be possible to render at that resolution, but there are a number of settings and configurations that can eat up RAM.

[holmes1977]

Re: Rendering Large Images

This was the answer I got from Thom which worked.

Also, remember that when increasing the output you often can decrease other settings.

For instance, if you got your scene looking good at 800x600 with IR -4, -1, then when you increase output to 1600x1200 you can adjust your IR to -5, -2 since the IR is resolution dependant.

This lowered the RAM usage by heaps.

Cheers Thom

[LookOut]

Re: Rendering Large Images

Following the logic that IR settings can be adjusted for larger resolution renderings - what can the IR setings be for a 5000px wide image? Is there a scale to calculate the possible combinations or does one have to use trial and error?

Should the Irradiance Map HSph. Subdivs and Samples settings be adjustable for larger resolution renderings with the same expected reduction in ram usage without compromising the quality of the rendered image?